CVE-2021-26917 json
PyBitmessage through 0.6.3.2 allows attackers to write screen captures to Potentially Unwanted Directories via a crafted apinotifypath valu…
published 2021-02-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13701
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
PyBitmessage through 0.6.3.2 allows attackers to write screen captures to Potentially Unwanted Directories via a crafted apinotifypath value. NOTE: the discoverer states "security mitigation may not be necessary as there is no evidence yet that these screen intercepts are actually transported away from the local host." NOTE: it is unclear whether there are any common use cases in which apinotifypath is controlled by an attacker
Patch / fix
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- poal.co https://poal.co/s/technology/290479 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
References
-
github.com
/Bitmessage/PyBitmessage/blob/f381721bec31641002e2f240309600c4994855a7/src/api.py#L35-L37
patch, third-party-advisory
-
poal.co
/s/technology/290479
exploit, third-party-advisory
-
github.com
/Bitmessage/PyBitmessage/releases
release-notes, third-party-advisory
-
attack.mitre.org
/techniques/T1113/
third-party-advisory
Sources
- CVE List CVE-2021-26917
- NVD CVE-2021-26917
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